Question

What is the approximate mass of one proton? And the approximate mass of a neutron? Add neutrons to the hydrogen isotope. How does adding neutrons affect the isotope symbol?

a. Proton mass: 1.67 x 10^-27 kg, Neutron mass: 1.67 x 10^-27 kg, Adding neutrons increases the atomic number.
b. Proton mass: 1.67 x 10^-27 kg, Neutron mass: 1.67 x 10^-27 kg, Adding neutrons decreases the atomic number.
c. Proton mass: 1.67 x 10^-27 g, Neutron mass: 1.67 x 10^-27 g, Adding neutrons increases the atomic mass.
d. Proton mass: 1.67 x 10^-27 g, Neutron mass: 1.67 x 10^-27 g, Adding neutrons decreases the atomic mass.

Answer 1

Protons and neutrons have an approximate mass of 1 atomic mass unit (amu). The symbol of the isotope changes when neutrons are added to the hydrogen isotope.

Step-by-step explanation:

A proton and a neutron have approximately the same mass, which is about 1.67 × 10-24 grams. This mass is equivalent to one atomic mass unit (amu) or one Dalton. Therefore, the approximate mass of one proton and one neutron is 1 amu.

When neutrons are added to the hydrogen isotope, the symbol of the isotope changes. For example, hydrogen usually has 1 proton and no neutrons, so its symbol is H. But if a neutron is added, the isotope would be called deuterium, and its symbol would be D. If two neutrons are added, it becomes tritium, and its symbol would be T.

In summary, the approximate mass of one proton and one neutron is 1 atomic mass unit. Adding neutrons to the hydrogen isotope changes the isotope symbol.